A company runs a batch processing job every night that takes about 3 hours to complete. The job runs on Amazon EC2 instances. The workload is fault-tolerant and can be interrupted and resumed without issues. <br/><br/>Which EC2 pricing model will provide the MOST cost savings?

Answer options:

On-Demand Instances

Reserved Instances

Spot Instances

Dedicated Hosts

How to approach this question

Look for keywords 'fault-tolerant' and 'can be interrupted'. This always points to Spot Instances.

Full Answer

C.Spot Instances✓ Correct

Amazon EC2 Spot Instances let you take advantage of unused EC2 capacity in the AWS cloud. Spot Instances are available at up to a 90% discount compared to On-Demand prices. They are ideal for fault-tolerant, flexible workloads.

Common mistakes

Choosing Reserved Instances for a job that only runs 3 hours a day.

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